Collapsible catch basin grate filter assembly

Claim 1

For combination with a stormwater catch basin having an opening grate, a catch basin filter assembly comprising: a lower rigid rectangular open frame element having a plan area substantially co-extensive with the plan area of the stormwater catch basin opening grate; an upper rigid rectangular open frame element having a plan area substantially co-extensive with the plan area of said lower rigid rectangular open frame element; a collapsible mesh fabric filter tube element connected to and carried at its opposite extremes by said lower and upper rigid rectangular open frame elements; and multiple support leg elements each pivotally connected to one of said lower and upper rigid rectangular open frame elements and each rotatable from a collapsed condition to an erected condition, said multiple support leg elements contacting the other of said lower and upper rigid rectangular open frame elements and placing said collapsible mesh fabric filter tube element in a taut condition when pivoted to said erected condition.